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A solution contains magnesium ions (Mg^(...

A solution contains magnesium ions `(Mg^(2+))` , iron (II) ,ions `(Fe^(2+))` and copper ions `(Cu^(2+))` .On passing an elctric curent through this soolution , which ions will be the first to be discharged at the cathode ? Write the equation for the cathode reaction .

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To determine which ions will be discharged first at the cathode during electrolysis, we need to consider the reduction potentials of the ions present in the solution. The ions in the solution are magnesium ions `(Mg^(2+))`, iron (II) ions `(Fe^(2+))`, and copper ions `(Cu^(2+))`. ### Step-by-Step Solution: 1. **Identify the Ions and Their Reduction Potentials**: - The reduction potentials for the ions are as follows: - \( Mg^{2+} + 2e^- \rightarrow Mg \) has a reduction potential of \( -2.71 \, V \) - \( Fe^{2+} + 2e^- \rightarrow Fe \) has a reduction potential of \( -0.45 \, V \) ...
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